SAFE public projects git trees. - safe/jmp/linux-2.6/blob - drivers/media/video/em28xx/em28xx-dvb.c

   1 /*
   2  DVB device driver for em28xx
   3
   4  (c) 2008 Mauro Carvalho Chehab <mchehab@infradead.org>
   5
   6  (c) 2008 Devin Heitmueller <devin.heitmueller@gmail.com>
   7         - Fixes for the driver to properly work with HVR-950
   8
   9  (c) 2008 Aidan Thornton <makosoft@googlemail.com>
  10
  11  Based on cx88-dvb, saa7134-dvb and videobuf-dvb originally written by:
  12         (c) 2004, 2005 Chris Pascoe <c.pascoe@itee.uq.edu.au>
  13         (c) 2004 Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]
  14
  15  This program is free software; you can redistribute it and/or modify
  16  it under the terms of the GNU General Public License as published by
  17  the Free Software Foundation; either version 2 of the License.
  18  */
  19
  20 #include <linux/kernel.h>
  21 #include <linux/usb.h>
  22
  23 #include "em28xx.h"
  24 #include <media/v4l2-common.h>
  25 #include <media/videobuf-vmalloc.h>
  26
  27 #include "lgdt330x.h"
  28 #include "zl10353.h"
  29
  30 MODULE_DESCRIPTION("driver for em28xx based DVB cards");
  31 MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@infradead.org>");
  32 MODULE_LICENSE("GPL");
  33
  34 static unsigned int debug;
  35 module_param(debug, int, 0644);
  36 MODULE_PARM_DESC(debug, "enable debug messages [dvb]");
  37
  38 DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
  39
  40 #define dprintk(level, fmt, arg...) do {                        \
  41 if (debug >= level)                                             \
  42         printk(KERN_DEBUG "%s/2-dvb: " fmt, dev->name, ## arg); \
  43 } while (0)
  44
  45 #define EM28XX_DVB_NUM_BUFS 5
  46 #define EM28XX_DVB_MAX_PACKETSIZE 564
  47 #define EM28XX_DVB_MAX_PACKETS 64
  48
  49 struct em28xx_dvb {
  50         struct dvb_frontend        *frontend;
  51
  52         /* feed count management */
  53         struct mutex               lock;
  54         int                        nfeeds;
  55
  56         /* general boilerplate stuff */
  57         struct dvb_adapter         adapter;
  58         struct dvb_demux           demux;
  59         struct dmxdev              dmxdev;
  60         struct dmx_frontend        fe_hw;
  61         struct dmx_frontend        fe_mem;
  62         struct dvb_net             net;
  63 };
  64
  65
  66 static inline void print_err_status(struct em28xx *dev,
  67                                      int packet, int status)
  68 {
  69         char *errmsg = "Unknown";
  70
  71         switch (status) {
  72         case -ENOENT:
  73                 errmsg = "unlinked synchronuously";
  74                 break;
  75         case -ECONNRESET:
  76                 errmsg = "unlinked asynchronuously";
  77                 break;
  78         case -ENOSR:
  79                 errmsg = "Buffer error (overrun)";
  80                 break;
  81         case -EPIPE:
  82                 errmsg = "Stalled (device not responding)";
  83                 break;
  84         case -EOVERFLOW:
  85                 errmsg = "Babble (bad cable?)";
  86                 break;
  87         case -EPROTO:
  88                 errmsg = "Bit-stuff error (bad cable?)";
  89                 break;
  90         case -EILSEQ:
  91                 errmsg = "CRC/Timeout (could be anything)";
  92                 break;
  93         case -ETIME:
  94                 errmsg = "Device does not respond";
  95                 break;
  96         }
  97         if (packet < 0) {
  98                 dprintk(1, "URB status %d [%s].\n", status, errmsg);
  99         } else {
 100                 dprintk(1, "URB packet %d, status %d [%s].\n", packet, status, errmsg);
 101         }
 102 }
 103
 104 static inline int dvb_isoc_copy(struct em28xx *dev, struct urb *urb)
 105 {
 106         int i;
 107
 108         if (!dev)
 109                 return 0;
 110
 111         if ((dev->state & DEV_DISCONNECTED) || (dev->state & DEV_MISCONFIGURED))
 112                 return 0;
 113
 114         if (urb->status < 0) {
 115                 print_err_status(dev, -1, urb->status);
 116                 if (urb->status == -ENOENT)
 117                         return 0;
 118         }
 119
 120         for (i = 0; i < urb->number_of_packets; i++) {
 121                 int status = urb->iso_frame_desc[i].status;
 122
 123                 if (status < 0) {
 124                         print_err_status(dev, i, status);
 125                         if (urb->iso_frame_desc[i].status != -EPROTO)
 126                                 continue;
 127                 }
 128
 129                 dvb_dmx_swfilter(&dev->dvb->demux, urb->transfer_buffer +
 130                                  urb->iso_frame_desc[i].offset,
 131                                  urb->iso_frame_desc[i].actual_length);
 132         }
 133
 134         return 0;
 135 }
 136
 137 static int start_streaming(struct em28xx_dvb* dvb) {
 138         struct em28xx *dev = dvb->adapter.priv;
 139
 140         usb_set_interface(dev->udev, 0, 1);
 141         dev->em28xx_write_regs_req(dev,0x00,0x48,"\x00",1);
 142
 143         return em28xx_init_isoc(dev, EM28XX_DVB_MAX_PACKETS,
 144                                 EM28XX_DVB_NUM_BUFS, EM28XX_DVB_MAX_PACKETSIZE,
 145                                 dvb_isoc_copy, EM28XX_DIGITAL_CAPTURE);
 146 }
 147
 148 static int stop_streaming(struct em28xx_dvb* dvb) {
 149         struct em28xx *dev = dvb->adapter.priv;
 150
 151         em28xx_uninit_isoc(dev);
 152         return 0;
 153 }
 154
 155 static int start_feed(struct dvb_demux_feed *feed)
 156 {
 157         struct dvb_demux *demux  = feed->demux;
 158         struct em28xx_dvb *dvb = demux->priv;
 159         int rc, ret;
 160
 161         if (!demux->dmx.frontend)
 162                 return -EINVAL;
 163
 164         mutex_lock(&dvb->lock);
 165         dvb->nfeeds++;
 166         rc = dvb->nfeeds;
 167
 168         if (dvb->nfeeds == 1) {
 169                 ret = start_streaming(dvb);
 170                 if(ret < 0) rc = ret;
 171         }
 172
 173         mutex_unlock(&dvb->lock);
 174         return rc;
 175 }
 176
 177 static int stop_feed(struct dvb_demux_feed *feed)
 178 {
 179         struct dvb_demux *demux  = feed->demux;
 180         struct em28xx_dvb *dvb = demux->priv;
 181         int err = 0;
 182
 183         mutex_lock(&dvb->lock);
 184         dvb->nfeeds--;
 185         if (0 == dvb->nfeeds) {
 186                 err = stop_streaming(dvb);
 187         }
 188         mutex_unlock(&dvb->lock);
 189         return err;
 190 }
 191
 192
 193 /* ------------------------------------------------------------------ */
 194
 195 static struct lgdt330x_config em2880_lgdt3303_dev = {
 196         .demod_address = 0x0e,
 197         .demod_chip = LGDT3303,
 198 };
 199
 200 static struct zl10353_config em28xx_zl10353_with_xc3028 = {
 201         .demod_address = (0x1e >> 1),
 202         .no_tuner = 1,
 203         .parallel_ts = 1,
 204         .if2 = 45600,
 205 };
 206
 207 /* ------------------------------------------------------------------ */
 208
 209 static int attach_xc3028(u8 addr, struct em28xx *dev)
 210 {
 211         struct dvb_frontend *fe;
 212         struct xc2028_ctrl ctl;
 213         struct xc2028_config cfg;
 214
 215         memset (&cfg, 0, sizeof(cfg));
 216         cfg.i2c_adap  = &dev->i2c_adap;
 217         cfg.i2c_addr  = addr;
 218         cfg.ctrl      = &ctl;
 219         cfg.callback  = em28xx_tuner_callback;
 220
 221         em28xx_setup_xc3028(dev, &ctl);
 222
 223         if (!dev->dvb->frontend) {
 224                 printk(KERN_ERR "%s/2: dvb frontend not attached. "
 225                                 "Can't attach xc3028\n",
 226                        dev->name);
 227                 return -EINVAL;
 228         }
 229
 230         fe = dvb_attach(xc2028_attach, dev->dvb->frontend, &cfg);
 231         if (!fe) {
 232                 printk(KERN_ERR "%s/2: xc3028 attach failed\n",
 233                        dev->name);
 234                 dvb_frontend_detach(dev->dvb->frontend);
 235                 dvb_unregister_frontend(dev->dvb->frontend);
 236                 dev->dvb->frontend = NULL;
 237                 return -EINVAL;
 238         }
 239
 240         printk(KERN_INFO "%s/2: xc3028 attached\n", dev->name);
 241
 242         return 0;
 243 }
 244
 245 /* ------------------------------------------------------------------ */
 246
 247 int register_dvb(struct em28xx_dvb *dvb,
 248                  struct module *module,
 249                  struct em28xx *dev,
 250                  struct device *device)
 251 {
 252         int result;
 253
 254         mutex_init(&dvb->lock);
 255
 256         /* register adapter */
 257         result = dvb_register_adapter(&dvb->adapter, dev->name, module, device,
 258                                       adapter_nr);
 259         if (result < 0) {
 260                 printk(KERN_WARNING "%s: dvb_register_adapter failed (errno = %d)\n",
 261                        dev->name, result);
 262                 goto fail_adapter;
 263         }
 264         dvb->adapter.priv = dev;
 265
 266         /* register frontend */
 267         result = dvb_register_frontend(&dvb->adapter, dvb->frontend);
 268         if (result < 0) {
 269                 printk(KERN_WARNING "%s: dvb_register_frontend failed (errno = %d)\n",
 270                        dev->name, result);
 271                 goto fail_frontend;
 272         }
 273
 274         /* register demux stuff */
 275         dvb->demux.dmx.capabilities =
 276                 DMX_TS_FILTERING | DMX_SECTION_FILTERING |
 277                 DMX_MEMORY_BASED_FILTERING;
 278         dvb->demux.priv       = dvb;
 279         dvb->demux.filternum  = 256;
 280         dvb->demux.feednum    = 256;
 281         dvb->demux.start_feed = start_feed;
 282         dvb->demux.stop_feed  = stop_feed;
 283         result = dvb_dmx_init(&dvb->demux);
 284         if (result < 0) {
 285                 printk(KERN_WARNING "%s: dvb_dmx_init failed (errno = %d)\n",
 286                        dev->name, result);
 287                 goto fail_dmx;
 288         }
 289
 290         dvb->dmxdev.filternum    = 256;
 291         dvb->dmxdev.demux        = &dvb->demux.dmx;
 292         dvb->dmxdev.capabilities = 0;
 293         result = dvb_dmxdev_init(&dvb->dmxdev, &dvb->adapter);
 294         if (result < 0) {
 295                 printk(KERN_WARNING "%s: dvb_dmxdev_init failed (errno = %d)\n",
 296                        dev->name, result);
 297                 goto fail_dmxdev;
 298         }
 299
 300         dvb->fe_hw.source = DMX_FRONTEND_0;
 301         result = dvb->demux.dmx.add_frontend(&dvb->demux.dmx, &dvb->fe_hw);
 302         if (result < 0) {
 303                 printk(KERN_WARNING "%s: add_frontend failed (DMX_FRONTEND_0, errno = %d)\n",
 304                        dev->name, result);
 305                 goto fail_fe_hw;
 306         }
 307
 308         dvb->fe_mem.source = DMX_MEMORY_FE;
 309         result = dvb->demux.dmx.add_frontend(&dvb->demux.dmx, &dvb->fe_mem);
 310         if (result < 0) {
 311                 printk(KERN_WARNING "%s: add_frontend failed (DMX_MEMORY_FE, errno = %d)\n",
 312                        dev->name, result);
 313                 goto fail_fe_mem;
 314         }
 315
 316         result = dvb->demux.dmx.connect_frontend(&dvb->demux.dmx, &dvb->fe_hw);
 317         if (result < 0) {
 318                 printk(KERN_WARNING "%s: connect_frontend failed (errno = %d)\n",
 319                        dev->name, result);
 320                 goto fail_fe_conn;
 321         }
 322
 323         /* register network adapter */
 324         dvb_net_init(&dvb->adapter, &dvb->net, &dvb->demux.dmx);
 325         return 0;
 326
 327 fail_fe_conn:
 328         dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_mem);
 329 fail_fe_mem:
 330         dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_hw);
 331 fail_fe_hw:
 332         dvb_dmxdev_release(&dvb->dmxdev);
 333 fail_dmxdev:
 334         dvb_dmx_release(&dvb->demux);
 335 fail_dmx:
 336         dvb_unregister_frontend(dvb->frontend);
 337 fail_frontend:
 338         dvb_frontend_detach(dvb->frontend);
 339         dvb_unregister_adapter(&dvb->adapter);
 340 fail_adapter:
 341         return result;
 342 }
 343
 344 static void unregister_dvb(struct em28xx_dvb *dvb)
 345 {
 346         dvb_net_release(&dvb->net);
 347         dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_mem);
 348         dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_hw);
 349         dvb_dmxdev_release(&dvb->dmxdev);
 350         dvb_dmx_release(&dvb->demux);
 351         dvb_unregister_frontend(dvb->frontend);
 352         dvb_frontend_detach(dvb->frontend);
 353         dvb_unregister_adapter(&dvb->adapter);
 354 }
 355
 356
 357 static int dvb_init(struct em28xx *dev)
 358 {
 359         int result = 0;
 360         struct em28xx_dvb *dvb;
 361
 362         dvb = kzalloc(sizeof(struct em28xx_dvb), GFP_KERNEL);
 363         if(dvb == NULL) {
 364                 printk("em28xx_dvb: memory allocation failed\n");
 365                 return -ENOMEM;
 366         }
 367         dev->dvb = dvb;
 368
 369         /* init frontend */
 370         switch (dev->model) {
 371         case EM2880_BOARD_HAUPPAUGE_WINTV_HVR_950:
 372                 /* Enable lgdt330x */
 373                 dev->mode = EM28XX_DIGITAL_MODE;
 374                 em28xx_tuner_callback(dev, XC2028_TUNER_RESET, 0);
 375
 376                 dvb->frontend = dvb_attach(lgdt330x_attach,
 377                                            &em2880_lgdt3303_dev,
 378                                            &dev->i2c_adap);
 379                 if (attach_xc3028(0x61, dev) < 0) {
 380                         result = -EINVAL;
 381                         goto out_free;
 382                 }
 383                 break;
 384         case EM2880_BOARD_HAUPPAUGE_WINTV_HVR_900:
 385                 /* Enable zl10353 */
 386                 dev->mode = EM28XX_DIGITAL_MODE;
 387                 em28xx_tuner_callback(dev, XC2028_TUNER_RESET, 0);
 388                 dvb->frontend = dvb_attach(zl10353_attach,
 389                                            &em28xx_zl10353_with_xc3028,
 390                                            &dev->i2c_adap);
 391                 if (attach_xc3028(0x61, dev) < 0) {
 392                         result = -EINVAL;
 393                         goto out_free;
 394                 }
 395                 break;
 396         default:
 397                 printk(KERN_ERR "%s/2: The frontend of your DVB/ATSC card"
 398                                 " isn't supported yet\n",
 399                        dev->name);
 400                 break;
 401         }
 402         if (NULL == dvb->frontend) {
 403                 printk(KERN_ERR
 404                        "%s/2: frontend initialization failed\n",
 405                        dev->name);
 406                 result = -EINVAL;
 407                 goto out_free;
 408         }
 409
 410         /* register everything */
 411         result = register_dvb(dvb, THIS_MODULE, dev, &dev->udev->dev);
 412
 413         if (result < 0) {
 414                 goto out_free;
 415         }
 416
 417         return 0;
 418
 419 out_free:
 420         kfree(dvb);
 421         dev->dvb = NULL;
 422         return result;
 423 }
 424
 425 static int dvb_fini(struct em28xx *dev)
 426 {
 427         if (dev->dvb) {
 428                 unregister_dvb(dev->dvb);
 429                 dev->dvb = NULL;
 430         }
 431
 432         return 0;
 433 }
 434
 435 static struct em28xx_ops dvb_ops = {
 436         .id   = EM28XX_DVB,
 437         .name = "Em28xx dvb Extension",
 438         .init = dvb_init,
 439         .fini = dvb_fini,
 440 };
 441
 442 static int __init em28xx_dvb_register(void)
 443 {
 444         return em28xx_register_extension(&dvb_ops);
 445 }
 446
 447 static void __exit em28xx_dvb_unregister(void)
 448 {
 449         em28xx_unregister_extension(&dvb_ops);
 450 }
 451
 452 module_init(em28xx_dvb_register);
 453 module_exit(em28xx_dvb_unregister);